DEVELOPMENT OF FOUNDATION WORK FOR REDUCTION OF EARTHQUAKE RESPONSE : Part II Dynamic deformation characteristics of high damping material

Abstract

A foundation work for reduction of earthquake response was proposed in a previous paper (Part I ). The dynamic deformation characteristics of a high damping material employed in this foundation work are shown in this paper (Part II). A mixture material of gravel and asphalt termed Asphalt Gravel was selected for the high damping material on which the dynamic deformation tests were conducted. The test results indicated that the elastic moduli changed with fluctuation of temperature, confining stress and exciting frequency, but this material still provided higher damping capacity and exhibited a stable hysteresis loop. No inadequate points were recognized on application of the asphalt gravel to this foundation work.